I would like to have seen the Court of Mars - Strife, General Destruction, Duke of Deception, Earl of Greed, Lord Conquest - return to Earth, to empower or create the original Silver Swan, who was poised for archenemy slot, in the mid-80s, before Crisis. With Doctor Cyber in the story, teaming up with her to conquer the world, by manipulating tanks, supersonic jets, tanks, missiles, technology...
I think changing the characters and the story could have made a very different movie.